The biggest difference tool provides evidence of improvement to a patient's experience.
It also helps identify the key aspects of the experience that have been (or will be) changed and what part of the service made (or is likely to make) the difference.
Why use it
This tool is important because it focuses on the patient's experience. It is designed to allow you to explore an improvement without needing detailed knowledge of the 'original' (pre-improvement) experience. But with this knowledge, it does allow you to compare and contrast the new experiences with the original.
When to use it
You can use this tool to evaluate a prototype or pilot version of an improvement, or to monitor the performance of an improvement after implementation.